221112009979 has 8 divisors (see below), whose sum is σ = 252707816448. Its totient is φ = 189518297640.

The previous prime is 221112009961. The next prime is 221112009983. The reversal of 221112009979 is 979900211122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221112009979 - 2⁷ = 221112009851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221112009179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290347 + ... + 725620.

It is an arithmetic number, because the mean of its divisors is an integer number (31588477056).

Almost surely, 2^221112009979 is an apocalyptic number.

221112009979 is a deficient number, since it is larger than the sum of its proper divisors (31595806469).

221112009979 is a wasteful number, since it uses less digits than its factorization.

221112009979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047065.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 221112009979 in words is "two hundred twenty-one billion, one hundred twelve million, nine thousand, nine hundred seventy-nine".